* {
    margin: 0;
}

.top {
    background-image: url("../img/banner_qtah.jpg");
    color: white;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    height: 808px;
}

/*所有的div都需要有一个居中*/
.top > div {
    display: flex;
    justify-content: center;
}

/*如果要居中，必须设置宽度 */
.top > div > div {
    width: 1000px;
}

.company {
    /*border: 1px solid red;*/
    /*margin: 10px 20px 30px 40px;*/
    /*padding: 10px 20px 30px 40px;*/
    display: flex;
    justify-content: center;
}

/*子选择器*/
.company > div {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.company > div > div:nth-child(2) {
    display: flex;
    align-items: center;
}

.company > div > div:nth-child(2) > div {
    margin: 0 5px;
}

.company > div > div:nth-child(2) > div:nth-child(1) {
    height: 30px;
    width: 30px;
}

.company > div > div:nth-child(2) > div:nth-child(1) > img {
    height: 100%;
    width: 100%;
}

.company > div > div:first-child {
    height: 141px;
    width: 204px;
}

.company > div > div:first-child > img {
    height: 100%;
    width: 100%;
}

/*-----------导航----------------*/

.nva {
    background-color: #E69039;
    height: 50px;
}

.nva > div {
    display: flex;
    align-items: center;
}

.nva > div > div {
    /*margin: 10px;*/
    /*height: 50px;*/
    line-height: 50px;
    padding: 0 20px;
}

.nva > div > div:hover {
    color: #E69039;
    background-color: white;
    cursor: pointer;
}
.nva > div > div:hover a{
    color: #E69039;
}
/*-----------------广告--------------------------*/
.ad > div {
    /*border: 1px solid red;*/
}

.ad > div > div:nth-child(1) {
    font-size: 50px;
    margin: 40px 0 20px;
}

.ad > div > div:nth-child(2) > div {
    /*line-height: 30px;*/
    margin: 10px 0;
}

.ad > div > div:nth-child(3) {
    color: #E69039;
    font-size: 40px;
}

.ad > div > div:nth-child(3) > div:nth-child(2) {
    text-indent: 2em;
}

.ad > div > div:nth-child(3) > div:nth-child(1) {
    display: flex;
    align-items: flex-end;
}

.ad > div > div:nth-child(3) > div:nth-child(1) > div {
    margin: 20px 0;
}

.ad > div > div:nth-child(3) > div:nth-child(1) > div:nth-child(odd) {
    color: white;
    font-size: 30px;
}
a{
    text-decoration: none;
    color:white;
}